Matthew 6:24
"No one can serve two masters; for either he will hate the one, and love the other; or he will hold to one, and despise the other. Ye cannot serve God and Mammon.
Colossians 3:22
Servants, obey in all things your masters according to the flesh; not with eye-service, as men-pleasers, but in singleness of heart, fearing the Lord.
1 John 2:15
Love not the world, nor the things in the world. If anyone loves the world, the love of the Father is not in him;
2 Peter 2:15-22
leaving the right way, they were led astray, having followed the way of Balaam, the son of Beor, who loved the wages of unrighteousness,